Event-driven control of a speed varying digital displacement machine

Niels Henrik Pedersen, Per Johansen, Torben O. Andersen

Research output: Contribution to book/anthology/report/conference proceedingArticle in proceedingResearchpeer-review

14 Citations (Scopus)

Abstract

The design and analysis of feedback controllers for digital displacement machines requires a control oriented model. The displacement throughput of a full stroke operated machine is altered on a stroke-by-stroke basis at fixed rotation angles. In the case of a fixed speed operation, it may be treated as a Discrete Linear Time Invariant control problem with synchronous sampling rate. To make synchronous linear control theory applicable for a variable speed digital displacement machine, a method based on event-driven control is presented. Using this method, the time domain differential equations are converted into the spatial (position) domain to obtain a constant sampling rate and thus allowing for use of classical control theory. The method is applied to a down scaled digital fluid power motor, where the motor speed is controlled at varying references under varying pressure and load torque conditions. The controller synthesis is carried out as a discrete optimal deterministic problem with full state feedback. Based on a linear analysis of the feedback control system, stability is proven in a pre-specified operation region. Simulation of a non-linear evaluation model with the controller implemented shows great performance, both with respect to tracking and disturbance rejection.
Original languageEnglish
Title of host publicationProceedings of the 2017 Bath/ASME Symposium on Fluid Power and Motion Control, FPMC2017
Number of pages10
PublisherAmerican Society of Mechanical Engineers
Publication dateOct 2017
ISBN (Electronic)978-0-7918-5833-2
DOIs
Publication statusPublished - Oct 2017
Event2017 Bath/ASME Symposium on Fluid Power and Motion Control, FPMC2017 - Sarasota, United States
Duration: 16 Oct 201719 Oct 2017

Conference

Conference2017 Bath/ASME Symposium on Fluid Power and Motion Control, FPMC2017
Country/TerritoryUnited States
CitySarasota
Period16/10/201719/10/2017

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